Volvo Owners Club Forum - View Single Post

sheerwater · Dec 13th, 2002, 09:17

Hi,
If the alternator is like mine you may find that you can recon it very cheaply. Mine is a BOSCH and if you look on the back you will see a black button about the size of a 50p piece and held on by 2 screws. This is the regulator / brush holder unit. Undoing the 2 screws it gently pulls out so you can see if the brushes are worn. The regulator/brush units cost about £20 (intermotor I believe) and are readily available. When replacing there are internal contacts which need cleaning. If the alternator is out then the job is dead easy. As Peter says check the wiring first especially the thin wire to the back of the alternator (usually a spade connector) as any break in this can have the same effect as alternator failure. Cheers Nige PS disconnect battery before working on brush gear!!!! unless you are into arc welding!!!

Dec 13th, 2002, 09:17	#3
sheerwater Master Member Last Online: Feb 24th, 2019 17:59 Join Date: Dec 2001 Location: Northampton	RE: Alternator on 740SL Hi, If the alternator is like mine you may find that you can recon it very cheaply. Mine is a BOSCH and if you look on the back you will see a black button about the size of a 50p piece and held on by 2 screws. This is the regulator / brush holder unit. Undoing the 2 screws it gently pulls out so you can see if the brushes are worn. The regulator/brush units cost about £20 (intermotor I believe) and are readily available. When replacing there are internal contacts which need cleaning. If the alternator is out then the job is dead easy. As Peter says check the wiring first especially the thin wire to the back of the alternator (usually a spade connector) as any break in this can have the same effect as alternator failure. Cheers Nige PS disconnect battery before working on brush gear!!!! unless you are into arc welding!!!